TY - JOUR
T1 - Differential gene expression in embryogenic and non-embryogenic clusters from cell suspension cultures of Coffea arabica
AU - Quiroz-Figueroa, Francisco
AU - Méndez-Zeel, Marcela
AU - Sánchez-Teyer, Felipe
AU - Rojas-Herrera, Rafael
AU - Loyola-Vargas, Victor M.
N1 - Funding Information:
Acknowledgements. This work was supported by Consejo Nacional de Ciencia y Tecnología, México by grants 4123P-N and 31816-N and post-graduate scholarships to FQF (116916), LST (118132) and RRH (117155). The authors thank F. Barredo-Pool for technical assistance on histological study, and S. Kú-Rodriguez for technical assistance on the electrophoresis study.
PY - 2002/11/1
Y1 - 2002/11/1
N2 - Somatic embryogenesis (SE) is a very useful system for studying the differentiation process in plants and involves gene regulation at several levels. During SE induction in Coffea arabica cv. Catura Rojo two types of cell clusters, embryogenic (EC) and non-embryogenic (NEC), were observed. The goal of this work was to compare the most relevant characteristics between EC and NEC for a better understanding of the mechanism driving SE. Morphohistological observations indicated a correlation between the morphological features of clusters and their embryogenic competence. On the other hand, no variation at the DNA level, studied by AFLP, were found to explain the disparity in embryogenic competence of clusters, but gene expression, observed by RNA differential display, and SDS-PAGE showed differences that can explain that disparity. Our results lead us to propose that differential gene expression can modulate the embryogenic capacity of coffee cells and that the number of genes turned off in somatic cells to allow for the change from a somatic to an embryogenic state, is higher than those genes that are turned on.
AB - Somatic embryogenesis (SE) is a very useful system for studying the differentiation process in plants and involves gene regulation at several levels. During SE induction in Coffea arabica cv. Catura Rojo two types of cell clusters, embryogenic (EC) and non-embryogenic (NEC), were observed. The goal of this work was to compare the most relevant characteristics between EC and NEC for a better understanding of the mechanism driving SE. Morphohistological observations indicated a correlation between the morphological features of clusters and their embryogenic competence. On the other hand, no variation at the DNA level, studied by AFLP, were found to explain the disparity in embryogenic competence of clusters, but gene expression, observed by RNA differential display, and SDS-PAGE showed differences that can explain that disparity. Our results lead us to propose that differential gene expression can modulate the embryogenic capacity of coffee cells and that the number of genes turned off in somatic cells to allow for the change from a somatic to an embryogenic state, is higher than those genes that are turned on.
KW - Coffea arabica
KW - Embryogenic cluster
KW - Non-embryogenic clusters
KW - Somatic embryogenesis
UR - http://www.scopus.com/inward/record.url?scp=0036856425&partnerID=8YFLogxK
U2 - 10.1078/0176-1617-00878
DO - 10.1078/0176-1617-00878
M3 - Artículo
AN - SCOPUS:0036856425
SN - 0176-1617
VL - 159
SP - 1267
EP - 1270
JO - Journal of Plant Physiology
JF - Journal of Plant Physiology
IS - 11
ER -